JP6969392B2 - Goods transport device - Google Patents

Description

The present invention relates to an article transport device for transporting articles.

For example, the following Patent Document 1 (Japanese Unexamined Patent Publication No. 2014-105100) discloses an article transporting device for transporting a pallet [3] as an article. In the article transport device of Patent Document 1, the pallet [3] is transported to the handling device [6] by the transport vehicle [2]. Then, the pallet [3] is conveyed to the work conveyor [70] where the worker is located by the handling device [6].

The handling device [6] has a separation mechanism [30] for separating the pallet [3] from the transport vehicle [2], and the separation mechanism [30] is used to separate the pallet [3] from the transport vehicle [2]. Have received. Specifically, the transport vehicle [2] travels toward the handling device [6] and enters the area of the handling device [6], so that the pallet [3] mounted on the transport vehicle [2] is placed. ] Rides on the inclined conveyor [31] of the separation mechanism [30]. Then, the pallet [3] is separated from the transport vehicle [2] by the operation of the inclined conveyor [31], moves on the inclined conveyor [31], and is conveyed to the inside of the handling device [6].
As a result, the pallet [3] is handed over from the transport vehicle [2] to the handling device [6].

Japanese Unexamined Patent Publication No. 2014-105100

By the way, for example, in a mechanism such as the above-mentioned handling device, a driving device such as an electric motor for driving the conveyor is required. However, if the number of such drive devices installed in the article transport device increases, the number of places where maintenance is required for the article transport device as a whole also increases, and the installation space for the drive device is required, so that the equipment becomes larger. There was a problem that it was easy to connect to.

In view of the above circumstances, it is desired to realize an article transporting device that is easy to maintain and easy to miniaturize.

The article transport device according to this disclosure is
An article transport device that transports articles from the first place to the second place.
A transport vehicle provided at a set transport height and having a transport platform on which articles are placed, and reciprocating between the first place and the second place, and a transport vehicle.
A delivery unit provided at the first place to deliver the goods to the transport vehicle, and
A receiving unit provided at the second place and receiving goods from the transport vehicle is provided.
The delivery unit has a first mounting table on which articles are placed and a first lifting mechanism for raising and lowering the first mounting table.
The receiving unit has a second mounting table on which articles are placed and a second lifting mechanism for raising and lowering the second mounting table.
The first elevating mechanism is a first driven unit that is pushed by the transport vehicle moving from the second place side toward the first place and follows the movement of the transport vehicle to lower the first mounting table. The first mounting table is lowered from a position above the set transport height to a position below the set transport height in accordance with the arrival of the transport vehicle at the first place. The article placed on the stand is transferred to the transport stand, and the article is transferred to the transport stand.
The second elevating mechanism is a second driven unit that is pushed by the transport vehicle moving from the first place side toward the second place and follows the movement of the transport vehicle to raise the second mounting table. The second mounting table is raised from a position below the set transport height to a position above the set transport height in accordance with the arrival of the transport vehicle at the second location. The article placed on the stand is transferred to the second stand.

According to this configuration, the first elevating mechanism of the delivery part lowers the first mounting table by the action of the first driven part by using the movement of the transport vehicle to transfer the article to and from the transport vehicle. Then, the second elevating mechanism of the receiving unit raises the second mounting table by using the movement of the transport vehicle by the action of the second driven unit to transfer the article to and from the transport vehicle. Therefore, in order for the first elevating mechanism to lower the first mounting table and the second elevating mechanism to raise the second mounting table, it is not necessary to provide a dedicated drive device. Therefore, the number of drive devices provided in the article transfer device can be suppressed to a small number, and as a result, an article transfer device with high maintainability and easy miniaturization can be realized.

Other article transport devices related to this disclosure are
An article transport device that transports articles from the first place to the second place.
A transport vehicle provided at a set transport height and having a transport platform on which articles are placed, and reciprocating between the first place and the second place, and a transport vehicle.
A delivery unit provided at the first place to deliver the goods to the transport vehicle, and
A receiving unit provided at the second place and receiving goods from the transport vehicle is provided.
The delivery unit has a first mounting table on which articles are placed and a first lifting mechanism for raising and lowering the first mounting table.
The receiving unit has a second mounting table on which articles are placed and a second lifting mechanism for raising and lowering the second mounting table.
The first elevating mechanism has a first driven portion that lowers the first mounting table in accordance with the movement of the transport vehicle moving from the second place side toward the first place, and the transport vehicle. The article placed on the first mounting table by lowering the first mounting table from a position above the set transport height to a position below the set transport height in accordance with the arrival at the first place. Is transferred to the transport platform,
The second elevating mechanism has a second driven portion that raises the second mounting table in accordance with the movement of the transport vehicle moving from the first place side toward the second place, and the transport vehicle. Upon arrival at the second place, the second mounting table is raised from a position below the set transport height to a position above the set transport height, and the article is placed on the transport platform. Was transferred to the second mounting table,
The transport platform is provided with an engaging protrusion that engages with an engaging recess provided on the bottom surface of the article.
The first elevating mechanism lowers the first mounting table while moving it from the second place side toward the first place side.
The second elevating mechanism raises the second mounting table while moving it from the first place side toward the second place side.

Other article transport devices related to this disclosure are
An article transport device that transports articles from the first place to the second place.
A transport vehicle provided at a set transport height and having a transport platform on which articles are placed, and reciprocating between the first place and the second place, and a transport vehicle.
A delivery unit provided at the first place to deliver the goods to the transport vehicle, and
A receiving unit provided at the second place and receiving goods from the transport vehicle is provided.
The delivery unit has a first mounting table on which articles are placed and a first lifting mechanism for raising and lowering the first mounting table.
The receiving unit has a second mounting table on which articles are placed and a second lifting mechanism for raising and lowering the second mounting table.
The first elevating mechanism has a first driven portion that lowers the first mounting table in accordance with the movement of the transport vehicle moving from the second place side toward the first place, and the transport vehicle. The article placed on the first mounting table by lowering the first mounting table from a position above the set transport height to a position below the set transport height in accordance with the arrival at the first place. Is transferred to the transport platform,
The second elevating mechanism has a second driven portion that raises the second mounting table in accordance with the movement of the transport vehicle moving from the first place side toward the second place, and the transport vehicle. Upon arrival at the second place, the second mounting table is raised from a position below the set transport height to a position above the set transport height, and the article is placed on the transport platform. Was transferred to the second mounting table,
The first elevating mechanism has a first urging portion that urges the first mounting table in an ascending direction, and is below the set transport height in accordance with the movement of the transport vehicle from the first place. The first mounting table is raised from the position of the above to the position above the set transport height.
The second elevating mechanism has a second urging portion that urges the second mounting table in the downward direction, and is above the set transport height in accordance with the fact that the transport vehicle is separated from the second place. The second mounting table is lowered from the position of No. 1 to a position below the set transfer height.

Further features and advantages of the techniques according to the present disclosure will be further clarified by the following illustration of exemplary and non-limiting embodiments described with reference to the drawings.

Longitudinal side view of an article transport facility equipped with an article transport device Top view of the article transfer device A diagram schematically showing the transfer operation from the first mounting table to the transport mounting table. The figure which shows the transfer operation from the transport stand to the second stand roughly. Explanatory drawing showing the operation of the first mounting table Explanatory drawing showing the operation of the second mounting table The figure which shows the article transporting apparatus which concerns on 2nd Embodiment The figure which shows the article transporting apparatus which concerns on 2nd Embodiment The figure which shows the article transporting apparatus which concerns on 3rd Embodiment The figure which shows the article transporting apparatus which concerns on 3rd Embodiment

1. 1. First Embodiment The first embodiment of the article transport device will be described with reference to the drawings. The article transport device 100 transports the article 8 from the first place 10 to the second place 20. Such an article transport device 100 can be applied to, for example, an article transport facility F for transporting or storing a semiconductor wafer, a reticle, or the like. Hereinafter, as an example, an example in which the article transport device 100 is applied to the article transport facility F as described above will be described.

1-1. Configuration of Article Transport Equipment As shown in FIG. 1, the article 8 is transported from the first place 10 to the second place 20. For example, the article 8 is a FOUP (Front Opening Unified Pod) in which a semiconductor wafer is housed. However, without being limited to this, the article 8 may be a reticle pod in which a reticle is housed.

In the example shown in FIG. 1, the article transport facility F is provided with an article storage shelf 5 for storing the article 8. Inside the article storage shelf 5, a plurality of storage sections 51 for storing the article 8 are provided. The plurality of storage portions 51 are arranged, for example, along the vertical direction and the horizontal direction (horizontal direction).

In the present embodiment, the first place 10 is set outside the article storage shelf 5 (near the outside), and the second place 20 is set inside the article storage shelf 5. That is, in the present embodiment, the article transport device 100 transports the article 8 from the outside of the article storage shelf 5 in which the first place 10 is set to the inside of the article storage shelf 5 in which the second place 20 is set. do.

In the example shown in FIG. 1, the article transport facility F includes a first transport device T1 that transports the article 8 from a predetermined location in the facility to the outside vicinity (first location 10) of the article storage shelf 5, and a first transport device T1. The article transport device 100 that receives the article 8 transported by the device T1 and transports the article 8 to the inside of the article storage shelf 5 (second place 20), and the article 8 conveyed by the article transport device 100 is received and said. A second transport device T2 for transporting the article 8 to any of the plurality of storage portions 51 of the article storage shelf 5 is provided.

The first transport device T1 is configured as, for example, a ceiling transport vehicle that travels along a ceiling rail 99 provided on the ceiling while holding the article 8. Further, the first transport device T1 has an elevating mechanism and is configured to be able to elevate the article 8. That is, the first transport device T1 transports the article 8 from another place in the facility to the vicinity of the outside of the article storage shelf 5, and corresponds to the article transport device 100 arranged below the first transport device T1. Hand over the article 8. In the present embodiment, the place where the article transport device 100 delivers the article 8 from the first transport device T1 is set as the first place 10. Then, as described above, the article transport device 100 transports the article 8 received from the first transport device T1 from the first place 10 to the second place 20 (inside the article storage shelf), and the second transport device. Hand over to T2. In the present embodiment, the place where the article transport device 100 delivers the article 8 to the second transport device T2 is set as the second place 20. The details of the article transport device 100 will be described later.

The second transport device T2 is arranged inside the article storage shelf 5, and is configured as, for example, a stacker crane having a vertical elevating mechanism and a horizontal traveling mechanism. The second transport device T2 moves in the vertical direction and the horizontal direction while holding the article 8, and transports the article 8 to any of a plurality of storage portions 51 arranged in the vertical direction and the horizontal direction. The second transport device T2 receives the article 8 from the article transport device 100 at the second place 20, and transports the article 8 to the storage unit 51. The article 8 conveyed to the storage unit 51 is stored in the storage unit 51.

As described above, when the article transport device 100 is applied to the article transport facility F, the article transport device 100 includes a first transport device T1 for transporting the article 8 outside the article storage shelf 5 and an article storage shelf. A function as a transport device provided between the second transport device T2 for transporting the article 8 to each storage unit 51 inside the 5 and delivering the article 8 received from the first transport device T1 to the second transport device T2. do.

Further, although not shown, the article transport facility F also includes an article transport device 100 that transports the article 8 from the inside of the article storage shelf 5 to the outside of the article storage shelf 5. In this case, the first place 10 is set inside the article storage shelf 5, and the second place 20 is set outside the article storage shelf 5. That is, a delivery unit 1 (described later) is provided inside the article storage shelf 5, and a receiving unit 2 (described later) is provided outside the article storage shelf 5. Even in this case, the configuration of the article transport device 100 itself can be the same except that the positional relationship between the first location 10 and the second location 20 with respect to the article storage shelf 5 is reversed. As a result, the article transport facility F can both carry in and out the article 8 to the article storage shelf 5.

1-2. Configuration of Article Transport Device Next, the details of the article transport device 100 will be described.

As shown in FIGS. 1 and 2, the article transport device 100 includes a transport path portion 9 extending from the first place 10 to the second place 20. The transport path portion 9 extends along the transport direction L in which the article transport device 100 transports the article 8. In the illustrated example, the transport path portion 9 is formed in a box shape extending along the transport direction L, and an opening 91 extending along the transport direction L is formed at the upper end thereof. In the following, the 10 side of the first place in the "transport direction L" will be referred to as the "first side L1 in the transport direction", and the second place 20 side opposite to the "first side L2 in the transport direction" will be referred to as the "second side L2 in the transport direction". The direction orthogonal to the "transport direction L" in the vertical direction is referred to as the "transport width direction W".

The article transport device 100 is provided at the first place 10 to deliver the article 8 to the transport vehicle 30, and is provided at the second place 20 to receive the article 8 from the transport vehicle 30. It is equipped with. Further, in the present embodiment, the transport path portion 9 is provided with the first place 10 and the second place 20.

The delivery unit 1 has a first mounting table 11 on which the article 8 is placed, and a first lifting mechanism 12 for raising and lowering the first mounting table 11. As shown in FIG. 2, in the present embodiment, the first mounting table 11 has a notch 11A that opens in the vertical direction and the second side L2 in the transport direction. In the illustrated example, the notch 11A is formed in the central portion of the first mounting table 11 in the transport width direction W. The cutout portion 11A functions as a first passing portion 11A for the first mounting table 11 to pass in the vertical direction with respect to the transport mounting table 31 of the transport vehicle 30 described later.

Further, the first mounting table 11 includes a first positioning unit 11B for positioning the article 8. The article 8 is positioned in the horizontal plane by the first positioning unit 11B. In the present embodiment, the first positioning portion 11B is configured to have an engaging pin that engages with the engaging recess 81 provided on the bottom surface of the article 8. Engagement recesses 81 are provided, for example, at three locations on the bottom surface of the article 8. Correspondingly, the first positioning portion 11B has three engaging pins.
The three engaging pins are arranged at positions corresponding to the three engaging recesses 81.

The receiving unit 2 has a second mounting table 21 on which the article 8 is placed, and a second lifting mechanism 22 for raising and lowering the second mounting table 21. As shown in FIG. 2, in the present embodiment, the second mounting table 21 is composed of a pair of table members separated in the transport width direction W. As a result, the second mounting table 21 has space portions 21A that open on both sides in the vertical direction and the transport direction L.
The space portion 21A functions as a second passing portion 21A for the second mounting table 21 to pass in the vertical direction with respect to the transport mounting table 31 of the transport vehicle 30 described later. When the space portion 21A is open on both sides in the transport direction L, for example, when the second transport device T2 is configured to support the bottom surface of the article 8 by a fork mechanism, the second mounting table 21 is used. The placed article 8 can be scooped from the second side L2 in the transport direction by the second transport device T2.

Further, the second mounting table 21 includes a second positioning unit 21B for positioning the article 8. The article 8 is positioned in the horizontal plane by the second positioning unit 21B. In the present embodiment, the second positioning portion 21B is arranged apart from each other in the transport width direction W, and has a pair of engaging pins that engage with the engaging recess 81 of the article 8 and both sides of the article 8 in the transport width direction W. It is configured to have a pair of support blocks that support the surface. The pair of engaging pins are arranged at positions corresponding to two of the three engaging recesses 81 provided on the bottom surface of the article 8.

The article transport device 100 includes a transport vehicle 30 that reciprocates between the first place 10 and the second place 20. The transport vehicle 30 has a transport mounting table 31 provided at a set transport height HT (see FIGS. 3 and 4) on which the article 8 is mounted. As shown in FIG. 2, the transport mounting table 31 is formed to be smaller than the first passing portion 11A of the first mounting table 11 and the second passing portion 21A of the second mounting table 21 in the vertical view. .. Therefore, the first mounting table 11 can pass through the transport mounting table 31 in the vertical direction by the first passing portion 11A. Further, the second mounting table 21 can pass through the transport mounting table 31 in the vertical direction by the second passing portion 21A.

Further, the transport mounting table 31 includes a positioning unit 31A for positioning the article 8. In the present embodiment, the transport mounting table 31 includes an engaging protrusion 31A that engages with an engaging recess 81 provided on the bottom surface of the article 8, and the engaging protrusion 31A corresponds to a positioning portion 31A. do. By engaging the engaging protrusion 31A with the engaging recess 81, the article 8 is positioned in the horizontal plane. Here, the engaging protrusion 31A is configured to have an engaging pin that engages with the engaging recess 81 provided on the bottom surface of the article 8. Specifically, three engaging pins are arranged at three locations corresponding to the three engaging recesses 81 provided at the three locations on the bottom surface of the article 8. In this example, the transport mounting table 31 is formed in a substantially triangular shape when viewed in the vertical direction. The engaging pins constituting the engaging protrusions 31A are provided so as to project upward at each of the apex portions of the triangles on the transport mounting table 31.

In the present embodiment, the transport vehicle 30 supports the vehicle body 33, a plurality of wheels 34 (four in this example) supported by the vehicle body 33, and the transport platform 31 extending upward from the vehicle body 33. It has a support portion 32 (see FIG. 1). As the plurality of wheels 34 roll on the bottom portion 93 of the transport path portion 9, the transport vehicle 30 reciprocates on the transport path portion 9. For example, the transport vehicle 30 has a traveling motor (not shown) that drives at least one of the plurality of wheels 34, and can travel on the transport path portion 9 by driving the traveling motor. The support portion 32 is arranged so as to insert the opening 91 of the transport path portion 9 in the vertical direction and project above the transport path portion 9. The support portion 32 supports the transport mounting table 31 at its upper end. In the present embodiment, the transport platform 31 is supported by the support portion 32 so that the height from the bottom portion 93 is the set transport height HT.

As described above, the first mounting table 11 that moves up and down by the first lifting mechanism 12, the transport mounting table 31 supported by the transport vehicle 30, and the second mounting table 21 that moves up and down by the second lifting mechanism 22 mutually. The article transporting device 100 is configured to be capable of transporting the article 8 from the first place 10 to the second place 20 by exchanging and receiving the article 8 in cooperation with the above. Hereinafter, the transportation of the article 8 by the article transport device 100 will be described with reference to FIGS. 3 and 4, which are schematic views.

In the present embodiment, the set transport height HT is set as the reference height of the transport platform 31 when the article 8 is transported by the transport vehicle 30. As described above, the transport mounting table 31 is supported by the support portion 32 and is located at a constant set transport height HT. In this example, the upper surface of the transport mounting table 31 is located at the set transport height HT. In the following, for convenience of explanation, the state in which the upper surface of the transport mounting table 31 is located at the set transport height HT will be described simply as assuming that the transport mounting table 31 is located at the set transport height HT. ..

As shown in FIG. 3, in the present embodiment, the first mounting table 11 has the first reference height H1 above the set transport height HT and the set transport by the first elevating mechanism 12 (see FIG. 1 and the like). It is configured to move up and down between the height HT and the post-delivery height HD, which is the height after the delivery of the article 8 to the transport platform 31 is completed.

In the present embodiment, the first reference height H1 is set as the reference height when the first mounting table 11 is not operating (elevating), and for example, the upper limit of the operating range of the first mounting table 11 is set. Is set as the height of. In this example, the upper surface of the first mounting table 11 is located at the first reference height H1 in a state where the first mounting table 11 is located at the upper limit height. As shown in the upper part of FIG. 3, the first reference height H1 is set above the set transfer height HT, which is the height at which the transfer mounting table 31 is located. In the following, for convenience of explanation, the state where the upper surface of the first mounting table 11 is located at the first reference height H1 is simply the state where the first mounting table 11 is located at the first reference height H1. Explain as a thing.

The height HD after delivery is set as, for example, the height of the lower limit of the operating range of the first mounting table 11. In this example, the upper surface of the first mounting table 11 is located at the height HD after delivery while the first mounting table 11 is located at the lower limit height. As shown in the lower figure of FIG. 3, the height HD after delivery is set below the set transfer height HT, which is the height at which the transfer platform 31 is located. In the following, for convenience of explanation, the state in which the upper surface of the first mounting table 11 is located at the height HD after delivery is simply assumed to be the state where the first mounting table 11 is located at the height HD after delivery. explain.

The transfer of the article 8 from the first mounting table 11 to the transport mounting table 31 is performed as follows. As shown in the upper part of FIG. 3, the article 8 initially delivered from the first transport device T1 (see FIG. 1) is placed on the first mounting table 11, and the first mounting table 11 is the first. It is located at 1 reference height H1.
The transport mounting table 31 moves toward the first side L1 in the transport direction while the transport vehicle 30 moves toward the first side L1 in the transport direction while being positioned at the set transport height HT. The first mounting table 11 descends in accordance with the movement of the transport mounting table 31 to the first side L1 in the transport direction. Then, in a state where the transport mounting table 31 completely overlaps with the first overlapping region 10R (see FIG. 2), the first mounting table 11 becomes the set transport height HT, and the transport vehicle 30 is further moved to the first side in the transport direction. By moving toward L1, as shown in the lower figure of FIG. 3, it moves (passes) below the transport mounting table 31. As a result, the article 8 is transferred from the first mounting table 11 to the transport mounting table 31. In the present embodiment, the "first overlapping region 10R" is defined by the outer shape of the article 8 when the article 8 is placed on the first mounting table 11 in the vertical view as shown in FIG. Area. Here, the region inside the outer shape of the article 8 is the first overlapping region 10R.

As shown in FIG. 4, in the present embodiment, the second mounting table 21 has a second reference height H2 below the set transport height HT and a set transport by the second elevating mechanism 22 (see FIG. 1 and the like). It is configured to move up and down between the height HR above the height HT and the height after receipt of the article 8 with respect to the transport platform 31.

In the present embodiment, the second reference height H2 is set as the reference height when the second mounting table 21 is not operating (elevating), for example, the lower limit of the operating range of the second mounting table 21. Is set as the height of. In this example, the upper surface of the second mounting table 21 is located at the second reference height H2 in a state where the second mounting table 21 is located at the lower limit height. As shown in the upper part of FIG. 4, the second reference height H2 is set below the set transfer height HT, which is the height at which the transfer mounting table 31 is located. In the following, for convenience of explanation, the upper surface of the second mounting table 21 is located at the second reference height H2, and the second mounting table 21 is simply located at the first reference height H1. Explain as a thing.

The height after receipt HR is set as, for example, the height of the upper limit of the operating range of the second mounting table 21. In this example, the upper surface of the second mounting table 21 is located at the height HR after receiving the second mounting table 21 in a state where the second mounting table 21 is located at the upper limit height. As shown in the lower figure of FIG. 4, the height after receipt HR is set above the set transport height HT, which is the height at which the transport mounting table 31 is located. In the following, for convenience of explanation, the state in which the upper surface of the second mounting table 21 is located at the height HR after receiving is simply assumed to be the state where the second mounting table 21 is located at the height HR after receiving. explain.

The transfer of the article 8 from the transport platform 31 to the second platform 21 is performed as follows. As shown in the upper figure of FIG. 4, the second mounting table 21 is initially located at the second reference height H2. Then, the article 8 delivered from the first mounting table 11 is placed (supported) on the transport mounting table 31.
The transport mounting table 31 moves toward the second side L2 in the transport direction while the transport vehicle 30 moves toward the second side L2 in the transport direction while being positioned at the set transport height HT. The second mounting table 21 rises in accordance with the movement of the transport mounting table 31 to the second side L2 in the transport direction. Then, in a state where the transport mounting table 31 completely overlaps with the second overlapping region 20R (see FIG. 2), the second mounting table 21 becomes the set transport height HT, and the transport vehicle 30 is further on the second side in the transport direction. By moving toward L2, as shown in the lower figure of FIG. 4, it moves (passes) above the transport mounting table 31. As a result, the article 8 is transferred from the transport mounting table 31 to the second mounting table 21. In the present embodiment, the "second overlapping region 20R" is defined by the outer shape of the article 8 when the article 8 is placed on the second mounting table 21 in the vertical view as shown in FIG. Area. Here, the region inside the outer shape of the article 8 is the second overlapping region 20R.

As described above, the article 8 is transferred from the first mounting table 11 to the transport mounting table 31, and the article 8 is transferred from the transport mounting table 31 to the second mounting table 21.

Next, the configuration for transferring the article 8 from the first mounting table 11 to the transport mounting table 31 will be described in detail.

The article 8 placed on the first mounting table 11 is delivered to the transport vehicle 30 (transport mounting table 31) by the delivery unit 1. As described above, the delivery unit 1 has a first elevating mechanism 12 for elevating and lowering the first mounting table 11. As shown in FIG. 5, the first elevating mechanism 12 is a transport vehicle that moves from the second place 20 side (see also FIGS. 1 and 2) toward the first place 10 (toward L1 on the first side in the transport direction). It has a first driven portion 13 that follows the movement of 30 to lower the first mounting table 11, and is located above the set transport height HT in accordance with the arrival of the transport vehicle 30 at the first place 10. 1 The first mounting table 11 is lowered from the reference height H1) to a position below the set transport height HT (height after delivery HD), and the article 8 mounted on the first mounting table 11 is transferred to the transport mounting table 31. Reprinted in. In the present embodiment, "following" means operating by utilizing the movement (kinetic energy) of the transport vehicle 30, and is operated by a drive source of the elevating mechanisms 12 and 22 separately from the transport vehicle 30. Does not include.

The first driven unit 13 is provided with a mechanism for converting the movement of the transport vehicle 30 along the horizontal direction into the lowering operation of the first mounting table 11. In the present embodiment, the first driven unit 13 converts the movement along the horizontal direction of the transport vehicle 30 moving from the second place 20 side toward the first place 10 into the lowering operation of the first mounting table 11. It is equipped with a 1-link mechanism 13X.

In the present embodiment, a pair of first link mechanisms 13X having the same structure are arranged on both sides in the transport width direction W (see FIG. 2). Hereinafter, the structure of only one side of the transport width direction W will be described with respect to the first link mechanism 13X unless otherwise specified. As shown in FIG. 5, in the first link mechanism 13X, the first lower link member 13A whose lower end is rotatably supported with respect to the bottom 93 of the transport path portion 9 and the first lower link member 13A. It has a first upper link member 13B which is arranged above the surface and whose upper end is rotatably supported with respect to the first mounting table 11. Further, the upper end portion of the first lower link member 13A and the lower end portion of the first upper link member 13B are rotatably connected to each other. As a result, the first lower link member 13A and the first upper link member 13B are connected to each other. In the present embodiment, the lower end portion of the first lower link member 13A is supported by the first support pin 13D that penetrates the lower end portion along the transport width direction W. Similarly, the upper end portion of the first upper link member 13B is supported by the first support pin 13D that penetrates the upper end portion along the transport width direction W. Further, the connecting portion between the first lower link member 13A and the first upper link member 13B is connected by a first connecting pin 13E penetrating the connecting portion along the transport width direction W. Further, although not shown, the transport path portion 9 is provided with a first guide portion that guides the first mounting table 11 in the vertical direction while keeping the upper surface of the first mounting table 11 horizontal.

The first link mechanism 13X is provided at the connecting portion between the first lower link member 13A and the first upper link member 13B, and is pressed by the pressing portion 35 of the transport vehicle 30, which will be described later, with respect to the first pressed portion 13C. Have. As shown in FIG. 2, in the present embodiment, the first pressed portion 13C is configured as a roller member rotatably supported by the first connecting pin 13E inside the transport width direction W. Then, the first pressed portion 13C fluctuates to the first side L1 and the lower side in the transport direction by being pressed by the first side L1 in the transport direction, and the first lower link member 13A and the first upper link member 13B. The first lower link member 13A and the first upper link member 13B are configured to swing in a direction in which the above is relatively bent.

The transport vehicle 30 is formed on a pair of side surface portions 33S of the vehicle body body 33 facing outward in the transport width direction W, and presses the first pressed portion 13C of the first link mechanism 13X against the first side L1 in the transport direction. It has a part 35. The pressing portion 35 is provided so as to overlap with the first pressed portion 13C in the transport direction L view. In the present embodiment, the pressing portion 35 is formed so as to extend along the vertical direction in response to the first pressed portion 13C that fluctuates in the vertical direction as described above, and the first pressed portion 13C. Regardless of the movement in the vertical direction, it is configured to always overlap with the first pressed portion 13C in the L view in the transport direction. In the illustrated example, the pressing portion 35 is formed in a plate shape extending in the vertical direction, and the surface facing the first side L1 in the transport direction reduces the impact when it comes into contact with the first pressed portion 13C. A cushioning member is provided. The cushioning member is also provided on the surface of the pressing portion 35 facing the second side L2 in the transport direction, whereby the pressing portion 35 also alleviates the impact when it comes into contact with the second pressed portion 23C described later. can do.

As shown in the middle diagram of FIG. 5, the transport vehicle 30 presses the first pressed portion 13C by the pressing portion 35 while moving to the first side L1 in the transport direction, so that the first pressed portion 13C is conveyed. It fluctuates downward on the first side L1 in the direction. As a result, the first lower link member 13A and the first upper link member 13B swing so as to be relatively bent, and the first mounting table 11 descends. As a result, as described above, the first mounting table 11 descends to the height HD after delivery, and in the process, the article 8 is delivered from the first mounting table 11 to the transport mounting table 31.

In the present embodiment, the first elevating mechanism 12 has a first urging portion 14 that urges the first mounting table 11 in the ascending direction, and the transport vehicle 30 is separated from the first place 10. The first mounting table 11 is raised from a position below the set transfer height HT (height after delivery HD) to a position above the set transfer height HT (first reference height H1). In this example, the first urging portion 14 is provided below the first mounting table 11 and is configured as a compression coil spring that presses the bottom surface of the first mounting table 11 upward. However, without being limited to such a configuration, the first biasing portion 14 is provided as, for example, above the first mounting table 11 and is configured as a tension coil spring that pulls the first mounting table 11 upward. Alternatively, it may be configured as a torsion coil spring provided over the first lower link member 13A and the first upper link member 13B and urging them in the extending direction.

Here, after the article 8 is delivered from the first mounting table 11 to the transport mounting table 31, the transport vehicle 30 starts to move toward the second side L2 in the transport direction, and at the same time, the action of the first urging unit 14 When the first mounting table 11 starts to rise and rises above the set transport height HT, there is a possibility that the rising first mounting table 11 and the article 8 mounted on the transport mounting table 31 come into contact with each other. be.

Therefore, in the present embodiment, the first elevating mechanism 12 transports the article 8 mounted on the transport mounting table 31 in the vertical direction from the first overlapping region 10R (see FIG. 2) where the article 8 overlaps with the first mounting table 11. It has a first regulation unit 15 that regulates the first mounting table 11 so as not to rise above the set transport height HT until the vehicle 30 is separated. In the present embodiment, the first regulation unit 15 has a first speed limit device 16. The first speed limiting device 16 is a device that slowly limits the ascending speed of the first mounting table 11 due to the urging force of the first urging unit 14. In this example, the first speed limiting device 16 is configured as a hydraulic damper that attenuates the kinetic energy of the first urging unit 14, and is in the opposite direction to the upward urging force of the first urging unit 14. Generates resistance (downward). In the illustrated example, the first speed limiting device 16 is arranged on the inner peripheral side of the first urging portion 14 configured as a compression coil spring. With the above configuration, as shown in the lower diagram of FIG. 5, after the transport vehicle 30 moves toward the second side L2 in the transport direction and the pressure on the first pressed portion 13C is released, the first mounting is performed. The pedestal 11 rises at a low speed, whereby the article 8 placed on the transport pedestal 31 in the vertical direction is separated from the first overlapping region 10R where the article 8 overlaps with the first pedestal 11, and then the first The mounting table 11 returns to the first reference height H1. In this embodiment, the first urging unit 14 and the first regulating unit 15 also have the same structure on both sides in the transport width direction W.

Next, the configuration for transferring the article 8 from the transport mounting table 31 to the second mounting table 21 will be described in detail.

The article 8 mounted on the transport mounting table 31 and transported to the second place 20 is received from the transport vehicle 30 (transport mounting table 31) by the receiving unit 2. As described above, the receiving unit 2 has a second elevating mechanism 22 that elevates and elevates the second mounting table 21. As shown in FIG. 6, the second elevating mechanism 22 is a transport vehicle that moves from the first place 10 side (see also FIGS. 1 and 2) toward the second place 20 (toward L2 on the second side in the transport direction). It has a second driven unit 23 that follows the movement of 30 to raise the second mounting table 21, and is located below the set transport height HT in accordance with the arrival of the transport vehicle 30 at the second location 20 (first). 2 Raise the second mounting table 21 from the reference height H2) to a position above the set transport height HT (height after receipt HR), and place the article 8 mounted on the transport mounting table 31 on the second mounting table. Reprinted in 21.

The second driven unit 23 is provided with a mechanism for converting the movement of the transport vehicle 30 along the horizontal direction into the ascending operation of the second mounting table 21. In the present embodiment, the second driven unit 23 converts the movement along the horizontal direction of the transport vehicle 30 moving from the first place 10 side toward the second place 20 into the ascending operation of the second mounting table 21. It is equipped with a 2-link mechanism 23X.

In the present embodiment, a pair of second link mechanisms 23X having the same structure are arranged on both sides in the transport width direction W. Hereinafter, the structure of only one side of the transport width direction W will be described with respect to the second link mechanism 23X unless otherwise specified. As shown in FIG. 6, in the second link mechanism 23X, the second lower link member 23A whose lower end is rotatably supported with respect to the bottom 93 of the transport path portion 9 and the second lower link member 23A. It has a second upper link member 23B which is arranged above the surface and whose upper end is rotatably supported with respect to the second mounting table 21. Further, the upper end portion of the second lower link member 23A and the lower end portion of the second upper link member 23B are rotatably connected to each other. As a result, the second lower link member 23A and the second upper link member 23B are connected to each other. In the present embodiment, the lower end portion of the second lower link member 23A is supported by the second support pin 23D that penetrates the lower end portion along the transport width direction W. Similarly, the upper end portion of the second upper link member 23B is supported by the second support pin 23D penetrating the upper end portion along the transport width direction W. Further, the connecting portion between the second lower link member 23A and the second upper link member 23B is connected by a second connecting pin 23E penetrating the connecting portion along the transport width direction W. Although not shown, the transport path portion 9 is provided with a second guide portion that guides the second mounting table 21 in the vertical direction while keeping the upper surface of the second mounting table 21 horizontal.

The second link mechanism 23X has a second pressed portion 23C provided at the connecting portion between the second lower link member 23A and the second upper link member 23B and pressed by the pressing portion 35 of the transport vehicle 30. ing. As shown in FIG. 2, in the present embodiment, the second pressed portion 23C is configured as a roller member rotatably supported by the second connecting pin 23E inside the transport width direction W. Then, the second pressed portion 23C fluctuates to the second side L2 and the upper side in the transport direction by being pressed by the second side L2 in the transport direction, and the second lower link member 23A and the second upper link member 23B. The second lower link member 23A and the second upper link member 23B are configured to swing in a direction in which the two lower link members 23A and the second upper link member 23B are relatively extended.

The pressing portion 35 of the transport vehicle 30 described above presses the second pressed portion 23C of the second link mechanism 23X toward the second side L2 in the transport direction. The pressing portion 35 is provided so as to overlap with the second pressed portion 23C in the transport direction L. As described above, the pressing portion 35 is formed so as to extend along the vertical direction. As a result, the pressing portion 35 is configured to always overlap with the second pressed portion 23C in the transport direction L view regardless of the vertical movement of the second pressed portion 23C. As described above, when the pressing portion 35 and the second pressed portion 23C come into contact with each other, the impact at the time of contact is caused by the cushioning member provided on the surface of the pressing portion 35 facing the second side L2 in the transport direction. Can be relaxed.

As shown in the middle diagram of FIG. 6, the transport vehicle 30 presses the second pressed portion 23C by the pressing portion 35 while moving to the second side L2 in the transport direction, so that the second pressed portion 23C is conveyed. It fluctuates upward on the second side L2 in the direction. As a result, the second lower link member 23A and the second upper link member 23B swing so as to be relatively stretched, and the second mounting table 21 rises. As a result, as described above, the second mounting table 21 rises to the height HR after receipt, and in the process, the article 8 is received from the transport mounting table 31 by the second mounting table 21.

In the present embodiment, the second elevating mechanism 22 has a second urging portion 24 that urges the second mounting table 21 in the downward direction, and the transport vehicle 30 is separated from the second place 20. The second mounting table 21 is lowered from the position above the set transfer height HT (height after receipt HR) to the position below the set transfer height HT (second reference height H2). In this example, the second urging portion 24 is provided below the second mounting table 21 and is configured as a tension coil spring that pulls the bottom surface of the second mounting table 21 downward. However, the second urging portion 24 is not limited to such a configuration, and is configured as, for example, a compression coil spring provided above the second mounting table 21 and pressing the second mounting table 21 downward. Alternatively, it may be provided as a torsion coil spring that is provided over the second lower link member 23A and the second upper link member 23B and urges them in a bending direction. The second elevating mechanism 22 may be configured not to have the second urging portion 24. In this case, the second mounting table 21 is configured to be lowered by, for example, its own weight.

Here, after the article 8 is received from the transport mounting table 31 by the second mounting table 21, the transport vehicle 30 starts to move toward the first side L1 in the transport direction, and at the same time, the action of the second urging unit 24 When the second mounting table 21 starts to descend and descends below the set transport height HT, there is a possibility that the article 8 mounted on the descending second mounting table 21 and the transport mounting table 31 come into contact with each other. be.

Therefore, in the present embodiment, the second elevating mechanism 22 transports the transport mounting table 31 from the second overlapping region 20R (see FIG. 2) where the transport mounting table 31 overlaps with the article 8 mounted on the second mounting table 21 in the vertical direction. It has a second regulating unit 25 that regulates the second mounting table 21 so that it does not descend below the set transport height HT until the vehicle 30 is separated. In the present embodiment, the second regulation unit 25 has a second speed limit device 26. The second speed limiting device 26 is a device that slowly limits the descending speed of the second mounting table 21 due to the urging force of the second urging unit 24. In this example, the second speed limiting device 26 is configured as a hydraulic damper that attenuates the kinetic energy of the second urging unit 24, and is in the opposite direction (in the opposite direction to the downward urging force of the second urging unit 24). Generates resistance (upward). In the illustrated example, the second speed limiting device 26 is arranged on the inner peripheral side of the second urging portion 24 configured as a tension coil spring. With the above configuration, as shown in the lower diagram of FIG. 6, after the transport vehicle 30 moves toward the first side L1 in the transport direction and the pressure on the second pressed portion 23C is released, the second mounting is performed. The pedestal 21 descends at a low speed, whereby the transport vehicle 30 is separated from the second overlapping region 20R where the transport pedestal 31 overlaps with the article 8 mounted on the second pedestal 21 in the vertical direction. The mounting table 21 returns to the second reference height H2. In this embodiment, the second urging unit 24 and the second regulating unit 25 also have the same structure on both sides in the transport width direction W.

2. 2. Second Embodiment Next, a second embodiment of the article transport device will be described. Hereinafter, the differences from the first embodiment will be mainly described. The points not particularly described are the same as those in the first embodiment described above.

As shown in FIG. 7, the transport vehicle 30 has a pressing portion 35A rotatably supported around an axis along the transport width direction W on the side surface portion 33S thereof. In the present embodiment, the pressing portion 35A is composed of a roller member, and is configured to press the side portion of the swinging first lower link member 13A along the first side L1 in the transport direction.

In the present embodiment, the first regulation unit 15 has a first engagement device 17. The first engaging device 17 is a member that rises together with the first mounting table 11 or the first mounting table 11 when the transport vehicle 30 is in the first overlapping region 10R (see FIG. 2). Is a device that disengages the first engaging member 17A when the transport vehicle 30 is separated from the first overlapping region 10R. In this example, the first engaging member 17A is configured to engage the first engaged portion 17B provided on the first lower link member 13A. In the illustrated example, the first engaged portion 17B is configured by a fixing pin fixed to the outside of the transport width direction W in the first lower link member 13A. However, without being limited to such a configuration, the first engaged portion 17B may be configured by, for example, a convex portion or a concave portion to which the first engaging member 17A can engage.

The tip of the first engaging member 17A is formed in a hook shape, and the tip is configured to engage with the first engaged portion 17B. Further, the base end portion of the first engaging member 17A is rotatably supported by the first swinging shaft portion 17E whose axial direction is the transport width direction W, and is centered on the first swinging shaft portion 17E. It is configured to swing to. In the present embodiment, the first engaging member 17A is urged in the engaging direction (counterclockwise in the example of FIG. 7) by an elastic member such as a coil spring. Further, on the upper surface of the first engaging member 17A, a first contact surface 17a that comes into contact with the first engaged portion 17B when it moves downward is provided. The first contact surface 17a is an inclined surface that tends toward the engaging direction as it goes downward. As a result, when the first contact surface 17a is pressed by the first engaged portion 17B that moves downward, the first engaging member 17A is shaken in the disengaging direction (clockwise in the example of FIG. 7). The force to move acts. Therefore, when the first engaged portion 17B moves downward when the first mounting table 11 is lowered, the first engaged portion 17B presses the first contact surface 17a to temporarily push the first engaging member 17A. When the first engaged portion 17B is positioned below the tip portion of the first engaged member 17A after being pushed away in the disengaging direction, the first engaged member 17A is moved to the first engaged portion by the urging force of the coil spring. Engage with 17B. Then, by engaging the first engaging member 17A with the first engaged portion 17B, the swing of the first lower link member 13A is restricted, and by extension, the ascending operation of the first mounting table 11 is restricted. NS.

In the present embodiment, the first engaging member 17A is engaged with the second side L2 in the transport direction from the first overlapping region 10R (see FIG. 2) according to the movement of the transport vehicle 30 to the second side L2 in the transport direction. A first release operation unit 17C for releasing the combined state is provided. More specifically, the first release operation unit 17C is provided at a position separated from the first overlapping region 10R on the second side L2 in the transport direction by at least a distance corresponding to the length of the transport direction L of the transport vehicle 30. There is. Thereby, the operation of the first disengaging operation unit 17C by the transport vehicle 30, that is, the disengagement of the engaged state of the first engaging member 17A can be performed at the timing when the transport vehicle 30 is separated from the first overlapping region 10R. It has become. In this example, the first release operation unit 17C is provided on the bottom portion 93 of the transport path portion 9, and is configured to be pressed downward by the wheels 34 of the transport vehicle 30 to be operated.

Although detailed illustration is omitted, in the first engaging device 17, the first engagement device 17 is engaged with the first engagement device 17 via the first release action unit 17D configured by, for example, a link mechanism, by operating the first release operation unit 17C. The coupling member 17A is configured to swing in the release direction (clockwise in the example of FIG. 7). As a result, the engaged state of the first engaging member 17A is released, the first lower link member 13A can swing, and the first mounting table 11 is allowed to rise.

Further, in the present embodiment, the second elevating mechanism 22 is configured in substantially the same manner as the first elevating mechanism 12. As shown in FIG. 8, in the present embodiment, the pressing portion 35A is configured to press the side portion of the swinging second lower link member 23A along the second side L2 in the transport direction.

In the present embodiment, the second regulating unit 25 has a second engaging device 27. The second engaging device 27 is a member that descends together with the second mounting table 21 or the second mounting table 21 when the transport vehicle 30 is in the second overlapping region 20R (see FIG. 2). Is a device that disengages the second engaging member 27A when the transport vehicle 30 is separated from the second overlapping region 20R. In this example, the second engaging member 27A is configured to engage the second engaged portion 27B provided on the second lower link member 23A. In the illustrated example, the second engaged portion 27B is configured by a fixing pin fixed to the outside of the transport width direction W in the second lower link member 23A. However, without being limited to such a configuration, the second engaged portion 27B may be configured by, for example, a convex portion or a concave portion to which the second engaging member 27A can engage.

The tip of the second engaging member 27A is formed in a hook shape, and the tip is configured to engage with the second engaged portion 27B. Further, the base end portion of the second engaging member 27A is rotatably supported by the second swinging shaft portion 27E whose axial direction is the transport width direction W, and is centered on the second swinging shaft portion 27E. It is configured to swing to. In the present embodiment, the second engaging member 27A is urged in the engaging direction (clockwise in the example of FIG. 8) by an elastic member such as a coil spring. Further, a second contact surface 27a that comes into contact with the second engaged portion 27B when the second engaged portion 27B moves upward is provided on the lower surface of the second engaging member 27A. The second contact surface 27a is an inclined surface that tends toward the engaging direction as it goes upward. As a result, when the second contact surface 27a is pressed by the second engaged portion 27B moving upward, the second engaging member 27A is released in the disengaging direction (counterclockwise direction in the example of FIG. 8). A rocking force acts. Therefore, when the second engaged portion 27B moves upward when the second mounting table 21 is raised, the second engaged portion 27B presses the second contact surface 27a to temporarily push the second engaging member 27A. When the second engaged portion 27B is positioned above the tip portion of the second engaged member 27A after being pushed away in the disengaging direction, the second engaged member 27A is moved to the second engaged portion by the urging force of the coil spring. Engage with 27B. Then, by engaging the second engaging member 27A with the second engaged portion 27B, the swing of the second lower link member 23A is restricted, and by extension, the lowering operation of the second mounting table 21 is restricted. NS.

In the present embodiment, the second engaging member 27A is engaged with the first side L1 in the transport direction from the second overlapping region 20R (see FIG. 2) according to the movement of the transport vehicle 30 to the first side L1 in the transport direction. A second release operation unit 27C for releasing the combined state is provided. More specifically, the second release operation unit 27C is provided at a position separated from the second overlapping region 20R on the first side L1 in the transport direction by at least a distance corresponding to the length of the transport direction L of the transport vehicle 30. There is. Thereby, the operation of the second disengaging operation unit 27C by the transport vehicle 30, that is, the disengagement of the engaged state of the second engaging member 27A can be performed at the timing when the transport vehicle 30 is separated from the second overlapping region 20R. It has become. In this example, the second release operation unit 27C is provided on the bottom portion 93 of the transport path portion 9, and is configured to be pressed downward by the wheels 34 of the transport vehicle 30 to be operated.

Although detailed illustration is omitted, the second engaging device 27 is engaged in the second engagement by operating the second releasing operation unit 27C, for example, via the second releasing action unit 27D configured by a link mechanism or the like. The coupling member 27A is configured to swing in the release direction (counterclockwise in the example of FIG. 8). As a result, the engaged state of the second engaging member 27A is released, the second lower link member 23A can swing, and the second mounting table 21 is allowed to descend.

3. 3. Third Embodiment Next, a third embodiment of the article transport device will be described. Hereinafter, the differences from the first embodiment will be mainly described. The points not particularly described are the same as those in the first embodiment.

As shown in FIG. 9, in the present embodiment, the first elevating mechanism 12 moves the first mounting table 11 from the second place 20 side toward the first place 10 side (toward the first side L1 in the transport direction). ) It is configured to move down while moving. As a result, in a configuration in which the engaging protrusion 31A provided on the transport mounting table 31 is engaged with the engaging recess 81 provided on the bottom surface of the article 8, the first mounting table 11 to the transport mounting table 31 When the article 8 is transferred to the article 8, the operation of engaging the engaging protrusion 31A with the engaging recess 81 can be appropriately performed. That is, according to the above configuration, the first mounting table 11 and the transport mounting table 31, more specifically, the engaging recess 81 of the article 8 mounted on the first mounting table 11 and the engagement that protrudes upward from the transport mounting table 31. The relative movement in the transport direction L with the collision portion 31A can be suppressed to a small extent. As a result, the engaging direction of the engaging recess 81 and the engaging protrusion 31A can be brought closer to each other in the vertical direction, and it becomes easy to appropriately engage the two. The first elevating mechanism 12 has at least the first mounting table 11 from the start of inserting the engaging protrusion 31A into the engaging recess 81 until the article 8 is placed on the first mounting table 11. It is preferable that the structure is such that the vehicle is lowered while being moved toward the first side L1 in the transport direction.

In the present embodiment, the first elevating mechanism 12 has a first driven portion 13, and the first driven portion 13 is in the horizontal direction of the transport vehicle 30 moving from the second place 20 side toward the first place 10. It is provided with a first cam mechanism 13Y that converts a movement along the line (movement toward the first side L1 in the transport direction) into a lowering movement of the first mounting table 11.

In the present embodiment, the first cam mechanism 13Y is pressed and conveyed by the cam 36 that moves along the transport direction L with the movement of the transport vehicle 30 and the cam 36 that moves to the first side L1 in the transport direction. It has a first side L1 in the direction and a first cam follower 13F that moves downward. In this example, the cam 36 is provided on the side surface portion 33S of the transport vehicle 30. Further, the cam 36 has a flat first pressing surface 36A, and the first pressing surface 36A is an inclined surface that goes upward toward the first side L1 in the transport direction. Further, in this example, the first cam follower 13F is connected to the first mounting table 11. In the illustrated example, the first cam follower 13F is composed of a roller member rotatably supported around an axis along the transport width direction W, and the tip of a support portion protruding downward from the bottom surface of the first mounting table 11. Is supported by. As the transport vehicle 30 moves to the first side L1 in the transport direction, the cam 36 comes into contact with the first cam follower 13F and pushes down the first cam follower 13F. As a result, a downward force is applied to the first mounting table 11.

Further, in the present embodiment, the first elevating mechanism 12 has a first guide mechanism 41 that guides the first mounting table 11 diagonally downward. As shown in FIG. 9, the first guide mechanism 41 has a first guide portion 41A and a first guided portion 41B guided by the first guide portion 41A. In this example, the first guide portion 41A is composed of a frame-shaped member that inclines downward toward the first side L1 in the transport direction. Although detailed illustration is omitted, the first guide portion 41A is supported by the transport path portion 9. The first guided portion 41B is arranged inside the first guide portion 41A and is configured to move while being guided along the extending direction of the first guide portion 41A. In the illustrated example, the first guided portion 41B is configured by a roller member rotatably supported around an axis along the transport width direction W at the tip of a support portion protruding downward from the bottom surface of the first mounting table 11. Has been done. With such a configuration, the first mounting table 11 to which the downward force is applied can be guided in a direction of inclining downward toward the first side L1 in the transport direction.

Here, in the above configuration, the first mounting table 11 moves relatively to the first side L1 in the transport direction with respect to the transport path portion 9. Therefore, in the present embodiment, the first guide mechanism 41 further has a first slide portion 41C that allows the movement of the first mounting table 11 to the first side L1 in the transport direction. As shown in FIG. 9, the first slide portion 41C is movably connected to the first fixing member 41D fixed to the bottom portion 93 of the transport path portion 9 with respect to the first fixing member 41D in the transport direction L. It also has a first moving member 41E. In the illustrated example, the first moving member 41E and the first mounting table 11 are connected to each other via the first urging unit 14 and the first speed limiting device 16. As a result, as the first mounting table 11 moves in the transport direction L, the first moving member 41E also moves in the same direction (transport direction L). Therefore, the movement of the first mounting table 11 in the transport direction L relative to the transport path portion 9 is allowed.

As shown in FIG. 10, in the present embodiment, the second elevating mechanism 22 moves the second mounting table 21 from the first place 10 side toward the second place 20 side (toward the second side L2 in the transport direction). ) It is configured to raise while moving. As a result, in a configuration in which the second positioning portion 21B provided on the second mounting table 21 engages with the engaging recess 81 provided on the bottom surface of the article 8, the transport mounting table 31 to the second mounting table 31 are used. When the article 8 is transferred to the article 21, the operation of engaging the second positioning portion 21B with the engaging recess 81 can be appropriately performed. That is, according to the above configuration, the transport mounting table 31 and the second mounting table 21, more specifically, the engaging recess 81 and the second mounting table 21 of the article 8 mounted on the transport mounting table 31 are provided upward. Relative movement in the transport direction L with the protruding second positioning portion 21B can be suppressed to a small extent. As a result, the engaging direction between the second positioning portion 21B and the engaging recess 81 can be brought closer to the vertical direction, and it becomes easy to appropriately engage the two. The second elevating mechanism 22 is mounted on the second lifting mechanism 22 at least from the start of inserting the second positioning portion 21B (engaging pin) into the engaging recess 81 until the article 8 is mounted on the transport mounting table 31. It is preferable that the platform 21 is configured to be lowered while being moved toward the second side L2 in the transport direction.

In the present embodiment, the second elevating mechanism 22 has a second driven portion 23, and the second driven portion 23 is in the horizontal direction of the transport vehicle 30 moving from the first place 10 side toward the second place 20. It is provided with a second cam mechanism 23Y that converts a movement along the line (movement toward L2 on the second side in the transport direction) into an ascending operation of the second mounting table 21.

In the present embodiment, the second cam mechanism 23Y is pressed and conveyed by the cam 36 that moves along the transport direction L with the movement of the transport vehicle 30 and the cam 36 that moves to the second side L2 in the transport direction. It has a second side L2 in the direction and a second cam follower 23F that moves upward. In this example, the cam 36 uses the same member as the first cam mechanism 13Y described above. That is, in this example, the cam 36 is configured to press both the first cam follower 13F and the second cam follower 23F. Therefore, the cam 36 has a flat second pressing surface 36B, and the second pressing surface 36B is an inclined surface that downwards toward the second side L2 in the transport direction. Further, in this example, the second cam follower 23F is connected to the second mounting table 21. In the illustrated example, the second cam follower 23F is composed of a roller member rotatably supported around an axis along the transport width direction W, and the tip of the support portion protruding downward from the bottom surface of the second mounting table 21. Is supported by. When the transport vehicle 30 moves to the second side L2 in the transport direction, the cam 36 comes into contact with the second cam follower 23F and pushes up the second cam follower 23F. As a result, an upward force is applied to the second mounting table 21.

Further, in the present embodiment, the second elevating mechanism 22 has a second guide mechanism 42 that guides the second mounting table 21 diagonally upward. As shown in FIG. 10, the second guide mechanism 42 has a second guide portion 42A and a second guided portion 42B guided by the second guide portion 42A. In this example, the second guide portion 42A is composed of a frame-shaped member that inclines upward toward the second side L2 in the transport direction. Although detailed illustration is omitted, the second guide portion 42A is supported by the transport path portion 9. The second guided portion 42B is arranged inside the second guide portion 42A and is configured to move while being guided along the extending direction of the second guide portion 42A. In the illustrated example, the second guided portion 42B is configured by a roller member rotatably supported around an axis along the transport width direction W at the tip of the support portion protruding downward from the bottom surface of the second mounting table 21. Has been done. With such a configuration, the second mounting table 21 to which the upward force is applied can be guided in a direction of tilting upward toward the second side L2 in the transport direction.

Here, in the above configuration, the second mounting table 21 moves relatively to the second side L2 in the transport direction with respect to the transport path portion 9. Therefore, in the present embodiment, the second guide mechanism 42 further has a second slide portion 42C that allows the second mounting table 21 to move to the second side L2 in the transport direction. As shown in FIG. 10, the second slide portion 42C is movably connected to the second fixing member 42D fixed to the bottom portion 93 of the transport path portion 9 and the second fixing member 42D in the transport direction L. It also has a second moving member 42E. In the illustrated example, the second moving member 42E and the second mounting table 21 are connected via the second urging portion 24 and the second speed limiting device 26.
As a result, as the second mounting table 21 moves in the transport direction L, the second moving member 42E also moves in the same direction (transport direction L). Therefore, the movement of the second mounting table 21 relative to the transport path portion 9 in the transport direction L is permitted.

4. Other Embodiments Next, other embodiments of the article transport device will be described.

(1) In the first embodiment described above, an example in which the first regulating unit 15 has the first speed limiting device 16 will be described, and in the second embodiment described above, the first regulating unit 15 is in charge of the first section. An example having the combined device 17 has been described. However, without being limited to such an example, the first regulating unit 15 may have at least one of the first speed limiting device 16 and the first engaging device 17, for example, the first regulating unit 15. May have both a first speed limiting device 16 and a first engaging device 17. Similarly, the second regulating unit 25 may have at least one of the second speed limiting device 26 and the second engaging device 27. For example, the second regulating unit 25 may have the second speed limiting device 26. And may have both of the second engaging device 27.

(2) In each of the above embodiments, as a mechanism for converting the movement of the transport vehicle 30 moving from the second place 20 side toward the first place 10 along the horizontal direction into the lowering movement of the first mounting table 11. In one embodiment, an example in which the first driven unit 13 has the first link mechanism 13X has been described, and in the third embodiment, an example in which the first driven unit 13 has the first cam mechanism 13Y has been described.
However, without being limited to such an example, the first driven unit 13 moves along the horizontal direction of the transport vehicle 30 moving from the second place 20 side toward the first place 10 on the first mounting table. It suffices to have at least one of a link mechanism and a cam mechanism that convert the descending motion of 11. Therefore, for example, the first driven unit 13 may include both a link mechanism and a cam mechanism. Similarly, for the second driven portion 23, the link that converts the movement along the horizontal direction of the transport vehicle 30 moving from the first place 10 side toward the second place 20 into the ascending operation of the second mounting table 21. It suffices to have at least one of a mechanism and a cam mechanism. Therefore, for example, the second driven unit 23 may include both a link mechanism and a cam mechanism.

(3) In the above-mentioned first embodiment, an example in which both the first pressed portion 13C and the second pressed portion 23C are pressed by one pressing portion 35 has been described. However, without being limited to such an example, a pair of pressing portions 35 may be provided corresponding to each of the first pressed portion 13C and the second pressed portion 23C.

(4) In the above-mentioned third embodiment, an example in which both the first cam follower 13F and the second cam follower 23F are pressed by one cam 36 has been described. However, without being limited to such an example, a pair of cams 36 may be provided corresponding to each of the first cam follower 13F and the second cam follower 23F.

(5) In each of the above embodiments, an example in which the first urging portion 14 and the second urging portion 24 are configured by a coil spring has been described. However, the present invention is not limited to such an example, and the first urging portion 14 and the second urging portion 24 may be made of other elastic members such as leaf springs. In addition to this, the first urging unit 14 and the second urging unit 24 are configured by using a mechanism such as an accumulator that transmits the urging force of the elastic member using hydraulic pressure. Is also good. In this case, by providing a flow path limiting unit such as a throttle in the liquid flow path, the flow path limiting unit may be configured to function as the first speed limiting device 16 or the second speed limiting device 26. ..

(6) The configurations disclosed in each of the above-described embodiments can be applied in combination with the configurations disclosed in other embodiments as long as there is no contradiction. With respect to other configurations, the embodiments disclosed herein are merely exemplary in all respects. Therefore, various modifications can be appropriately made without departing from the spirit of the present disclosure.

5. Outline of the above-described embodiment The outline of the article transport device described above will be described below.

An article transport device that transports articles from the first place to the second place.
A transport vehicle provided at a set transport height and having a transport platform on which articles are placed, and reciprocating between the first place and the second place, and a transport vehicle.
A delivery unit provided at the first place to deliver the goods to the transport vehicle, and
A receiving unit provided at the second place and receiving goods from the transport vehicle is provided.
The delivery unit has a first mounting table on which articles are placed and a first lifting mechanism for raising and lowering the first mounting table.
The receiving unit has a second mounting table on which articles are placed and a second lifting mechanism for raising and lowering the second mounting table.
The first elevating mechanism is a first driven unit that is pushed by the transport vehicle moving from the second place side toward the first place and follows the movement of the transport vehicle to lower the first mounting table. The first mounting table is lowered from a position above the set transport height to a position below the set transport height in accordance with the arrival of the transport vehicle at the first place. The article placed on the stand is transferred to the transport stand, and the article is transferred to the transport stand.
The second elevating mechanism is a second driven unit that is pushed by the transport vehicle moving from the first place side toward the second place and follows the movement of the transport vehicle to raise the second mounting table. The second mounting table is raised from a position below the set transport height to a position above the set transport height in accordance with the arrival of the transport vehicle at the second location. The article placed on the stand is transferred to the second stand.

According to this configuration, the first elevating mechanism of the delivery part lowers the first mounting table by the action of the first driven part by using the movement of the transport vehicle to transfer the article to and from the transport vehicle. Then, the second elevating mechanism of the receiving unit raises the second mounting table by using the movement of the transport vehicle by the action of the second driven unit to transfer the article to and from the transport vehicle. Therefore, in order for the first elevating mechanism to lower the first mounting table and the second elevating mechanism to raise the second mounting table, it is not necessary to provide a dedicated drive device. Therefore, the number of drive devices provided in the article transfer device can be suppressed to a small number, and as a result, an article transfer device with high maintainability and easy miniaturization can be realized.

An article transport device that transports articles from the first place to the second place.
A transport vehicle provided at a set transport height and having a transport platform on which articles are placed, and reciprocating between the first place and the second place, and a transport vehicle.
A delivery unit provided at the first place to deliver the goods to the transport vehicle, and
A receiving unit provided at the second place and receiving goods from the transport vehicle is provided.
The delivery unit has a first mounting table on which articles are placed and a first lifting mechanism for raising and lowering the first mounting table.
The receiving unit has a second mounting table on which articles are placed and a second lifting mechanism for raising and lowering the second mounting table.
The first elevating mechanism has a first driven portion that lowers the first mounting table in accordance with the movement of the transport vehicle moving from the second place side toward the first place, and the transport vehicle. The article placed on the first mounting table by lowering the first mounting table from a position above the set transport height to a position below the set transport height in accordance with the arrival at the first place. Is transferred to the transport platform,
The second elevating mechanism has a second driven portion that raises the second mounting table in accordance with the movement of the transport vehicle moving from the first place side toward the second place, and the transport vehicle. Upon arrival at the second place, the second mounting table is raised from a position below the set transport height to a position above the set transport height, and the article is placed on the transport platform. Was transferred to the second mounting table,
The transport platform is provided with an engaging protrusion that engages with an engaging recess provided on the bottom surface of the article.
The first elevating mechanism lowers the first mounting table while moving it from the second place side toward the first place side.
The second elevating mechanism raises the second mounting table while moving it from the first place side toward the second place side.

According to this configuration, in addition to the above effects, during the transportation of the article by the transport vehicle, the engaging protrusion provided on the transport platform is made to engage with the engaging recess provided on the bottom surface of the article. In the above configuration, when the article mounted on the first mounting table is transferred to the transport mounting table, the first mounting table is lowered while moving in the moving direction of the transport mounting table and the transport vehicle. Therefore, when the article is transferred from the first mounting table to the transport mounting table, the operation of engaging the engaging protrusion with the engaging recess can be appropriately performed. Similarly, when the article placed on the transport pedestal is transferred to the second pedestal, the second pedestal rises while moving in the moving direction of the transport pedestal and the transport vehicle. Therefore, when the article is transferred from the transport mounting table to the second mounting table, the operation of disengaging the engaging protrusion with the engaging recess can be appropriately performed. Therefore, it is possible to smoothly transfer the goods between each of the delivery unit and the receiving unit and the transport vehicle.

An article transport device that transports articles from the first place to the second place.
A transport vehicle provided at a set transport height and having a transport platform on which articles are placed, and reciprocating between the first place and the second place, and a transport vehicle.
A delivery unit provided at the first place to deliver the goods to the transport vehicle, and
A receiving unit provided at the second place and receiving goods from the transport vehicle is provided.
The delivery unit has a first mounting table on which articles are placed and a first lifting mechanism for raising and lowering the first mounting table.
The receiving unit has a second mounting table on which articles are placed and a second lifting mechanism for raising and lowering the second mounting table.
The first elevating mechanism has a first driven portion that lowers the first mounting table in accordance with the movement of the transport vehicle moving from the second place side toward the first place, and the transport vehicle. The article placed on the first mounting table by lowering the first mounting table from a position above the set transport height to a position below the set transport height in accordance with the arrival at the first place. Is transferred to the transport platform,
The second elevating mechanism has a second driven portion that raises the second mounting table in accordance with the movement of the transport vehicle moving from the first place side toward the second place, and the transport vehicle. Upon arrival at the second place, the second mounting table is raised from a position below the set transport height to a position above the set transport height, and the article is placed on the transport platform. Was transferred to the second mounting table,
The first elevating mechanism has a first urging portion that urges the first mounting table in an ascending direction, and is below the set transport height in accordance with the movement of the transport vehicle from the first place. The first mounting table is raised from the position of the above to the position above the set transport height.
The second elevating mechanism has a second urging portion that urges the second mounting table in the downward direction, and is above the set transport height in accordance with the fact that the transport vehicle is separated from the second place. The second mounting table is lowered from the position of No. 1 to a position below the set transfer height.

According to this configuration, in addition to the above effects, after the first elevating mechanism of the delivery part transfers the article to and from the transport vehicle, the first urging part automatically acts on the first mounting table. Can be returned to a position above the set transport height. In addition, after the second elevating mechanism of the receiving unit transfers the article to and from the transport vehicle, the second mounting table is automatically returned to a position below the set transport height by the action of the second urging unit. Can be made to. Therefore, it is not necessary to provide a dedicated drive device for the first elevating mechanism to raise the first mounting table after the article is transferred and the second elevating mechanism to lower the second mounting table after the article is transferred. Therefore, the number of drive devices provided in the article transfer device can be suppressed to a small number, and as a result, an article transfer device with high maintainability and easy miniaturization can be realized.

again,
In the first elevating mechanism, the first mounting table is set until the transport vehicle is separated from the first overlapping area where the article mounted on the transport mounting table in the vertical direction overlaps with the first mounting table. It has a first regulatory section that regulates not to rise above the transport height,
In the second elevating mechanism, the second mounting table is set by the second mounting table until the transport vehicle is separated from the second overlapping region where the transport mounting table overlaps with the article mounted on the second mounting table in the vertical direction. It is preferable to have a second regulatory section that regulates the vehicle so that it does not fall below the transport height.

According to this configuration, after the first elevating mechanism of the delivery section transfers the article to and from the transport vehicle, the first urging section acts to raise the first mounting table to a position above the set transport height. At the time of returning, it is possible to prevent the article placed on the transport mounting table from coming into contact with the first mounting table. In addition, when the second elevating mechanism of the receiving unit transfers the article to and from the transport vehicle, and then the second mounting table is returned to a position below the set transport height by the action of the second urging unit. , It is possible to prevent the transport mounting table and the article mounted on the second mounting table from coming into contact with each other. Therefore, it is possible to prevent the returning operation of the first mounting table and the second mounting table from hindering the transportation of the article by the transport vehicle.

again,
The first regulating unit has at least one of a first speed limiting device and a first engaging device.
The first speed limiting device is a device that slowly limits the ascending speed of the first mounting table by the urging force of the first urging unit.
The first engaging device engages the first engaging member with a member that rises together with the first mounting table or the first mounting table when the transport vehicle is in the first overlapping region. A device that disengages the first engaging member when the carrier leaves the first overlapping region.
The second regulating unit has at least one of a second speed limiting device and a second engaging device.
The second speed limiting device is a device that slowly limits the descending speed of the second mounting table by the urging force of the second urging unit.
The second engaging device engages the second engaging member with the second mounting table or the member that descends together with the second mounting table when the transport vehicle is in the second overlapping region. It is preferable that the device disengages the second engaging member when the transport vehicle leaves the second overlapping region.

According to this configuration, when the first regulating unit has the first speed limiting device, the first elevating mechanism of the delivery unit raises the first mounting table above the set transport height by the action of the first urging unit. By slowing the ascending speed of the first mounting table when returning to the position, it is possible to prevent the article mounted on the transport mounting table from coming into contact with the first mounting table. Further, when the first regulating unit has the first engaging device, the first engaging member is engaged so that the first mounting table does not rise when the transport vehicle is in the first overlapping region. This makes it possible to prevent the article placed on the transport mounting table from coming into contact with the first mounting table. Similarly, when the second regulating unit has a second speed limiting device, the second elevating mechanism of the receiving unit returns the second mounting table to a position below the set transport height by the action of the second urging unit. By slowing down the lowering speed of the second mounting table, the transport mounting table and the article mounted on the second mounting table can be prevented from coming into contact with each other. Further, when the second regulating unit has the second engaging device, the second engaging member is engaged so that the second mounting table does not lower when the transport vehicle is in the second overlapping region. Therefore, it is possible to prevent the transport mounting table and the article mounted on the second mounting table from coming into contact with each other. Therefore, it is possible to further reduce the possibility that the returning operation of the first mounting table and the second mounting table interferes with the transportation of the article by the transport vehicle.

again,
The first driven portion is at least a link mechanism and a cam mechanism that convert a horizontal movement of the transport vehicle moving from the second place side toward the first place into a lowering motion of the first mounting table. Equipped with one
The second driven portion is at least a link mechanism and a cam mechanism that convert a horizontal movement of the transport vehicle moving from the first place side toward the second place into an ascending operation of the second mounting table. It is preferable to have one.

According to this configuration, in the first elevating mechanism of the delivery part, the mechanism for converting the movement of the carrier vehicle along the horizontal direction into the lowering operation of the first mounting table is relatively one using at least one of the link mechanism and the cam mechanism. It can be realized by a simple configuration. Further, in the second elevating mechanism of the receiving unit, the mechanism for converting the movement of the transport vehicle along the horizontal direction into the ascending operation of the second mounting table is configured by a relatively simple configuration using at least one of the link mechanism and the cam mechanism. It can be realized. Therefore, it is possible to simplify the overall configuration of the article transport device, and to realize an article transport device that is easy to maintain and can be miniaturized.

The technology according to the present disclosure can be used for an article transport device for transporting articles.

100: Article transport device 1: Delivery unit 2: Receiving unit 8: Article 10: First place 10R: First overlapping area 11: First mounting table 12: First elevating mechanism 13: First driven unit 13X: First link Mechanism 13Y: 1st cam mechanism 14: 1st urging part 15: 1st regulating part 16: 1st speed limiting device 17: 1st engaging device 17A: 1st engaging member 20: 2nd place 20R: 2nd Overlapping area 21: 2nd mounting table 22: 2nd elevating mechanism 23: 2nd driven part 23X: 2nd link mechanism 23Y: 2nd cam mechanism 24: 2nd urging part 25: 2nd regulating part 26: 2nd speed Limiting device 27: Second engaging device 27A: Second engaging member 30: Transport vehicle 31: Transport mounting table 31A: Engagement protrusion 81: Engagement recess HT: Set transport height

Claims (6)

An article transport device that transports articles from the first place to the second place.
A transport vehicle provided at a set transport height and having a transport platform on which articles are placed, and reciprocating between the first place and the second place, and a transport vehicle.
A delivery unit provided at the first place to deliver the goods to the transport vehicle, and
A receiving unit provided at the second place and receiving goods from the transport vehicle is provided.
The delivery unit has a first mounting table on which articles are placed and a first lifting mechanism for raising and lowering the first mounting table.
The receiving unit has a second mounting table on which articles are placed and a second lifting mechanism for raising and lowering the second mounting table.
The first elevating mechanism is a first driven unit that is pushed by the transport vehicle moving from the second place side toward the first place and follows the movement of the transport vehicle to lower the first mounting table. The first mounting table is lowered from a position above the set transport height to a position below the set transport height in accordance with the arrival of the transport vehicle at the first place. The article placed on the stand is transferred to the transport stand, and the article is transferred to the transport stand.
The second elevating mechanism is a second driven unit that is pushed by the transport vehicle moving from the first place side toward the second place and follows the movement of the transport vehicle to raise the second mounting table. The second mounting table is raised from a position below the set transport height to a position above the set transport height in accordance with the arrival of the transport vehicle at the second location. An article transport device for transferring an article placed on a pedestal to the second pedestal. An article transport device that transports articles from the first place to the second place.
A transport vehicle provided at a set transport height and having a transport platform on which articles are placed, and reciprocating between the first place and the second place, and a transport vehicle.
A delivery unit provided at the first place to deliver the goods to the transport vehicle, and
A receiving unit provided at the second place and receiving goods from the transport vehicle is provided.
The delivery unit has a first mounting table on which articles are placed and a first lifting mechanism for raising and lowering the first mounting table.
The receiving unit has a second mounting table on which articles are placed and a second lifting mechanism for raising and lowering the second mounting table.
The first elevating mechanism has a first driven portion that lowers the first mounting table in accordance with the movement of the transport vehicle moving from the second place side toward the first place, and the transport vehicle. The article placed on the first mounting table by lowering the first mounting table from a position above the set transport height to a position below the set transport height in accordance with the arrival at the first place. Is transferred to the transport platform,
The second elevating mechanism has a second driven portion that raises the second mounting table in accordance with the movement of the transport vehicle moving from the first place side toward the second place, and the transport vehicle. Upon arrival at the second place, the second mounting table is raised from a position below the set transport height to a position above the set transport height, and the article is placed on the transport platform. Was transferred to the second mounting table,
The transport platform is provided with an engaging protrusion that engages with an engaging recess provided on the bottom surface of the article.
The first elevating mechanism lowers the first mounting table while moving it from the second place side toward the first place side.
The second elevating mechanism is an article transporting device that raises the second mounting table while moving it from the first place side toward the second place side. An article transport device that transports articles from the first place to the second place.
A transport vehicle provided at a set transport height and having a transport platform on which articles are placed, and reciprocating between the first place and the second place, and a transport vehicle.
A delivery unit provided at the first place to deliver the goods to the transport vehicle, and
A receiving unit provided at the second place and receiving goods from the transport vehicle is provided.
The delivery unit has a first mounting table on which articles are placed and a first lifting mechanism for raising and lowering the first mounting table.
The receiving unit has a second mounting table on which articles are placed and a second lifting mechanism for raising and lowering the second mounting table.
The first elevating mechanism has a first driven portion that lowers the first mounting table in accordance with the movement of the transport vehicle moving from the second place side toward the first place, and the transport vehicle. The article placed on the first mounting table by lowering the first mounting table from a position above the set transport height to a position below the set transport height in accordance with the arrival at the first place. Is transferred to the transport platform,
The second elevating mechanism has a second driven portion that raises the second mounting table in accordance with the movement of the transport vehicle moving from the first place side toward the second place, and the transport vehicle. Upon arrival at the second place, the second mounting table is raised from a position below the set transport height to a position above the set transport height, and the article is placed on the transport platform. Was transferred to the second mounting table,
The first elevating mechanism has a first urging portion that urges the first mounting table in an ascending direction, and is below the set transport height in accordance with the movement of the transport vehicle from the first place. The first mounting table is raised from the position of the above to the position above the set transport height.
The second elevating mechanism has a second urging portion that urges the second mounting table in the downward direction, and is above the set transport height in accordance with the fact that the transport vehicle is separated from the second place. An article transporting device that lowers the second mounting table from the position of No. 1 to a position below the set transport height. In the first elevating mechanism, the first mounting table is set until the transport vehicle is separated from the first overlapping area where the article mounted on the transport mounting table in the vertical direction overlaps with the first mounting table. It has a first regulatory section that regulates not to rise above the transport height,
In the second elevating mechanism, the second mounting table is set by the second mounting table until the transport vehicle is separated from the second overlapping region where the transport mounting table overlaps with the article mounted on the second mounting table in the vertical direction. The article transport device according to claim 3 , further comprising a second regulation unit that regulates the product so that it does not fall below the transport height. The first regulating unit has at least one of a first speed limiting device and a first engaging device.
The first speed limiting device is a device that slowly limits the ascending speed of the first mounting table by the urging force of the first urging unit.
The first engaging device engages the first engaging member with a member that rises together with the first mounting table or the first mounting table when the transport vehicle is in the first overlapping region. A device that disengages the first engaging member when the carrier leaves the first overlapping region.
The second regulating unit has at least one of a second speed limiting device and a second engaging device.
The second speed limiting device is a device that slowly limits the descending speed of the second mounting table by the urging force of the second urging unit.
When the carrier is in the second overlapping region, the second engaging device engages the second engaging member with the second mounting table or a member that descends together with the second mounting table. The article transport device according to claim 4 , which is a device for disengaging the second engaging member when the transport vehicle leaves the second overlapping region. The first driven portion is at least a link mechanism and a cam mechanism that convert a horizontal movement of the transport vehicle moving from the second place side toward the first place into a lowering motion of the first mounting table. Equipped with one
The second driven portion is at least a link mechanism and a cam mechanism that convert a horizontal movement of the transport vehicle moving from the first place side toward the second place into an ascending operation of the second mounting table. The article transport device according to any one of claims 1 to 5, comprising one.

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